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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a9c69b406c41e5646c9b2d34ce48a1ec4cb22d7811553dcde841267a918697c5' 
  AND token = '1XaX/khNwJA3Z30GEaatmPRhiqKrCV64woLhrGaT0Y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}